Skip navigation

Video flicker on keynote?

805 Views 13 Replies Latest reply: Apr 29, 2013 12:53 AM by Dick Cheung RSS
Dick Cheung Calculating status...
Currently Being Moderated
Feb 5, 2013 3:19 AM

I'm using latest 13" MBP retinal display.  I made a presentation with short video clips on the slide and I need to loop it to repeat the playing during the presentation.  The clip play smoothly on first time but when it loops on second and subsequent times, the video flicker.  I try to play the video with Quicktime and it loops well.

 

I just wonder if there is not enough 'power' of this 13" MBP (I know that the CPU in 15" is stronger) to play this simple task within Keynote?

 

Anyone know what's going on? Thanks!

MacBook Pro (Retina, 13-inch, Late 2012), OS X Mountain Lion (10.8.2)
  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Feb 5, 2013 6:24 AM (in response to Dick Cheung)

    What codec is used in the video?

    in Quicktime go to;   Window > show movie Inspector

  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Feb 5, 2013 7:49 AM (in response to Dick Cheung)

    How much RAM is installed?

    How much free disc space?

     

    best practice when playing  video  is close all applications except Keynote

  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Feb 6, 2013 2:43 AM (in response to Dick Cheung)

    I  never use MPEG1 now, its a very old format and clunky at best.

     

    so try converting the MPEG1 to H264 or MP4

     

    The application for this is:

    MPEG Streamclip

  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Feb 6, 2013 9:37 AM (in response to Dick Cheung)

    AVI is not a good file type to use on Mac, its a Microsoft type and many AVI files cant play at all on Mac.

     

    Stick with what works best;  H264 or MP4

  • thomas witt Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 23, 2013 12:51 AM (in response to Dick Cheung)

    Same problem here:

     

    When I use a QuickTime File exported straight from Apple Motion with the 1080p Preset (results in an 8Mbit/s video file with 1024x768 resolution) and put this clip into Keynote, I do get a lot of flickering-stuck video playback when playing back the Keynote.

     

     

    The same file plays perfectly in QuickTime player, only in Keynote.

     

     

    The flicker doesn't happen on my late 2012 iMac 27" with double monitor configuration as well, so it seems to be hardware related to the MBP 13" Retina (maybe because of the Intel 4000 chipset)?

  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Apr 23, 2013 5:35 AM (in response to thomas witt)

    As my previous posts suggest that H264 and MP4 CODECs work  well in Keynote. Other CODEC's require extra processing power which results in dropped frames and loss of audio sync.

  • thomas witt Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 23, 2013 5:50 AM (in response to Gary Scotland)

    Does not apply to me. Video was encoded in H.264.

  • Gary Scotland Level 5 Level 5 (7,555 points)
    Currently Being Moderated
    Apr 23, 2013 6:20 AM (in response to thomas witt)

    Then I would agree with the hardware issue,  the lack of a graphics card in the Macbook Pro prevents its use with us in working with video.

  • thomas witt Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 23, 2013 6:29 AM (in response to Gary Scotland)

    This is basically correct, but doesn't explain why a video plays perfectly even at really high bit rates in quicktime player and doesn't play well in keynote, even if there are not any overlays of other object. In my understanding, this is maybe also something which isn't implemented too well in Keynote.

     

    Given the fact that Keynotes last overhaul is now about 4 years ago - and the hardware as well as the OS evolved quite a bit in that time - that may be a legacy problem.

     

    Let's hope for Keynote '13 (as we hoped for Keynote '12, Keynote '11 and Keynote '10).

Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)

Legend

  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.